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公开(公告)号:US1851482A
公开(公告)日:1932-03-29
申请号:US42488630
申请日:1930-01-31
Applicant: INT STANDARD ELECTRIC CORP
Inventor: ELVIDGE BAKER JOHN HENRY
IPC: H04Q3/00
CPC classification number: H04Q3/00
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2.Automatic telephone system using single motion switch by-path circuits 失效
Title translation: 自动电话系统采用单动态切换旁路电路公开(公告)号:US1905785A
公开(公告)日:1933-04-25
申请号:US46392030
申请日:1930-06-26
Applicant: INT STANDARD ELECTRIC CORP
Inventor: ELVIDGE BAKER JOHN HENRY
IPC: H04Q3/00
CPC classification number: H04Q3/00
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公开(公告)号:US1857833A
公开(公告)日:1932-05-10
申请号:US41520329
申请日:1929-12-19
Applicant: INT STANDARD ELECTRIC CORP
Inventor: ELVIDGE BAKER JOHN HENRY , BAINES HAIGH LESLIE
IPC: H04Q3/42
CPC classification number: H04Q3/42
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